plano de amostragem utilizado no estudo de reprodução humana no distrito de são paulo
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ID: 160826
1968
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Abstract
Apresentação do processo de amostragem empregado para a seleção da amostra na qual se baseou o estudo da «Reprodução humana no Distrito de São Paulo», realizado pelo Departamento de Estatística Aplicada da Faculdade de Higiene e Saúde Pública da USP. O processo procurou resolver a situação criada com as limitações de verba, de tempo e carência de um sistema de referência que permitisse, no prazo estipulado e com a verba disponível, a seleção de uma amostra seguindo os procedimentos usuais de amostragem probabilística. Consistiu em aplicar amostragem em duas etapas, na qual a unidade primária foi domicílio e a unidade secundária foi mulher. Na primeira etapa empregou-se amostragem estratificada em que os estratos eram subdistritos. Para a seleção de unidades primárias sortearam-se pontos («pontos de partida») nos mapas dos subdistritos por um processo que se assemelha àquele chamado «grade quadrada», mas que difere deste quanto a vários aspectos. A cada «ponto de partida» selecionado corresponderam, por regras prefixadas, três domicílios com pelo menos uma mulher da população em estado residindo em cada um deles. Na segunda etapa, nos domicílios onde residia mais de uma mulher da população em estudo, procedeu-se a uma subamostragem na qual cada uma delas teve igual probabilidade de seleção. São também apresentados diferentes casos de ausência de resposta e as respectivas instruções às entrevistadoras.
This work presents the sampling procedure used to select the sample got for a "Human Reproduction Study in the District of São Paulo" (Brazil), done by the Department of Applied Statistics of "Faculdade de Higiene e Saúde Pública da Universidade de São Paulo". The procedure tried to solve the situation which resulted from the limitation in cost, time and lack of a frame that could be used in order to get a probability sample in the fixed term of time and with the fixed cost. It consisted in a two stage sampling with dwelling-units as primary units and women as secondary units. At the first stage, it was used stratified sampling in which sub-districts were taken as strata. In order to select primary units, there was a selection of points ("starting points") on the maps of subdistricts by a procedure that was similar to that one called "square grid" but differed from this in several aspects. There were fixed rules to establish a correspondence between each selected "starting point" and a set of three dwelling units where at least one woman of the target population lived. In the selected dwelling units where more than one woman of target population lived, there was a sub-sampling in order to select one of them. In this selection each woman living in the dwelling unit had equal probability of selection. Several "no-answer" cases and correspondent instructions to be followed by the interviewers are presented too.
This work presents the sampling procedure used to select the sample got for a "Human Reproduction Study in the District of São Paulo" (Brazil), done by the Department of Applied Statistics of "Faculdade de Higiene e Saúde Pública da Universidade de São Paulo". The procedure tried to solve the situation which resulted from the limitation in cost, time and lack of a frame that could be used in order to get a probability sample in the fixed term of time and with the fixed cost. It consisted in a two stage sampling with dwelling-units as primary units and women as secondary units. At the first stage, it was used stratified sampling in which sub-districts were taken as strata. In order to select primary units, there was a selection of points ("starting points") on the maps of subdistricts by a procedure that was similar to that one called "square grid" but differed from this in several aspects. There were fixed rules to establish a correspondence between each selected "starting point" and a set of three dwelling units where at least one woman of the target population lived. In the selected dwelling units where more than one woman of target population lived, there was a sub-sampling in order to select one of them. In this selection each woman living in the dwelling unit had equal probability of selection. Several "no-answer" cases and correspondent instructions to be followed by the interviewers are presented too.
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silva1968revistaplano
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| Authors | ;Eunice Pinho de Castro Silva |
| Journal | proceedings - 2016 3rd international conference on information technology, computer, and electrical engineering, icitacee 2016 |
| Year | 1968 |
| DOI |
10.1590/S0034-89101968000100002
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